Extension-spool.



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PHILIP JACOB MEAHL, 0F BAYONNE, NEW JERSEY.

EXTENSION-SPOOL.

Iatented Mar. 22, 1910.

Application filed April 9, 1906, Serial No. 310,658. Renewed July 2l,1909. Serial No. 508,742.

fo all whom it may concern.'

Be it known that I, PHILIP JACOB MEAHL, a citizen of the United Statesof America, and a resident of Bayonne, in the county of Hudson and Stateof New Jersey, have invented certain new and useful Improvements inEXtension-Spools, of which the following is a specification.

This invention relates to that type of spools upon which are wo-undrolls of perforated paper sheets employed to govern the' operation ofmechanical or automatic musical instruments; and the present improvementhas for its object to provide a simple and efficient structuralformation and combination of parts, in which the spool is adapted forready longitudinal extension and construction to compensate for thenatural expansion and contraction of the paper sheet rolled thereonunder varying weather conditions, and which at the same time is adaptedto effeetually withstand the usual torsional stress imposed upon theparts in the usual operations of tightening or loosening the music rollby a turning of the spool therein in one or the other direction, all aswill hereinafter more fully appear.

In the accompanying drawings Figuro l is a side elevation of a spoolembodying the present improvement. Fig. 2 is a transverse section of thesame at line en Fig. l. Fig. 3 is a perspective view showing the membersof the spool in a separated or detached relation.

Similar numerals of reference indicate like parts in the differentviews.

Referring to the draw1ngs:-1 is the elongated body of the spool, usuallyof a cylindrical form in cross sect-ion, and provided with end heads orflanges 2, and with aXial gudgeon pins or arbors 3,as usual. In thepresent invention the body l aforesaid is divided by a longitudinal slit4, and oppositely extending transverse slits into two substantiallycounterpart members 6 and 7, adapted for longitudinal movement one uponthe other, and each member carrying an individual ange 2 and individualgudgeon pin 3. The transverse slits 5, aforesaid, are preferably formeda distance away from the respective heads 2, so that each member willhave a portion S or 9, adjacent to the end hea-ds 2 of a fullcylindrical or other usual form for the proper support of the marginalparts of the sheet of paper or the like which is rolled upon and carriedby the roller.

l l, l l l l lit li l l 10 is a longitudinal key strip or spline on onemember having guiding engagement in a longitudinal groove 11 in thecompanion member, and adapt-ed to prevent independent lateral movementor displacement of the members when assembled together, and offer aneffectual resistance to the torsional stress to which the spool isexposed in the ordinary operations of tightening and loosening of themusic roll with a view to bring the same into proper condition for usein the automatic playing mechanism.

In the ordinary manufacture of the present roller, the longitudinal slitl and transverse slits 5 will be usually made in a cylindrical roller bymeans of a circular or other saw, and in order to compensate for thekerf removed by such saw in forming the longitudinal slit t, aforesaid,filler pieces 12, will be secured preferably at the respective ends ofsaid slit, as shown, to insure the proper cylindrical relation of thetwo members when assembled. In like manner the longitudinal groove lland corresponding slit in which the butt of the longitudinal key stripl0 is fitted, will be formed at one operation by a circular saw, andaffords a ready and efficient manner of attaining an accurate relationof the parts by which the two members of the roller are guided in alongitudinal extension movement.

The key strip l0 will be usually formed of wood, with the grain runningat right angles to the grain of the spool members, so as to afford amplestrength to the key strip to withstand the torsional strain, abovereferred to. In the preferred construction the key strip lO, will have asegmental form, the radius of which is less than that of the segmentalgroove ll, and with the central part of said strip and the central partof the groove in Contact as shown in dotted lines in Fig. l. As soarranged a slight spreading apart of the members 6 and 7 will take placein effecting the limited extension of the parts required in actualpractice, while under all conditions such arrangement stays the saidmembers centrally against the normal tendency to move together whensurrounded by the perforated music sheet.

In the employment of the present invention as a carrying spool for rollsof perforated music paper, one end of the paper' will be glued to asingle one of the spool members aforesaid; it being common to leave afoot or more of blank paper at such end. `With vention, what I claim asnew and desire to the paper thus glued to one member, and l with thecompanion spool member in place and the paper rolled thereupon, itfollows that there will be a half-dozen or more turns of blank paperaround the spool, which if wound tight will clasp and hold the spoolmembers together in a rm and substantial manner. lVith a requirement toincrease the length of the spool, on account of the paper having'swollen, the operator grasping the music or paper roll, by itsexterior', with one hand, imparts with the other hand a couple ofbackward turns to the spool, by means of one of its end heads orflanges; such operation will loosen the grip of the paper on the spoolmembers and the same can be adjusted longitudinally to accommodate thepaper, after which by giving the spool a couple of forward turns, theconditions heretofore described are restored, and the music roll willhave a tight and fast arrangement upon the spool. Vilith a shrinkage ofthe paper a similar operation is effected.

Having thus fully described my said insecure by Letters Patent, is z- 1.An extension spool, comprising a pair of semi-circular halves arrangedin parallel relation to each other and provided with full portions attheir' ends, and means for guiding the halves longitudinally,substantially as set forth.

2. An extension spool, comprising a pair of semi-circular halvesarranged in parallel. relation to each other and provided with fullportions at their ends, one half having a longitudinal key strip and theother half a longitudinal groove for guiding engagement With said keystrip, substantially as set forth.

3. An extension spool formed with a longitudinal slit and transverseslits extending oppositely from the end of the longitudinal slit todivide the spool into two members, and guiding means for connecting themembers together in a longitudinally adjustable manner, substantially asset forth.

4. An extension spool formed with a longitudinal slit and transverseslits extending oppositely from the end of the longitudinal slit todivide the spool into two members, one member having a longitudinal keystrip and the other member a longitudinal groove for guiding engagementwith the key strip, substantially as set forth.

5. An extension spool formed with a longitudinal slit and transverseslits extending' oppositely from the ends of the longitudinal slit todivide the spool into two members, filler pieces at the respective endsof the longitudinal slit, and guiding means for connecting the memberstogether in a longitudinally adjustable manner, substantially as setforth.

6. An extension spool formed with a longitudinal slit and transverseslits extending oppositely from the ends of the longitudinal slit todivide the spool into two members, filler pieces at the respective endsof the longitudinal slit, one member having a longitudinal key strip andthe other member a longitudinal groove for guiding engagement with saidkey slit, substantially as set forth.

7. An extension spool, comprising a pair of semi-circular halvesarranged in parallel relation to each other and provided with individualend flanges, and means for guiding the halves longitudinally,substantially as set forth.

S. An extension spool, comprising a pair of semi-circular halvesarranged in parallel relation to each other and provided with individualend flanges, one half having a longitudinal key strip and the other halfa longitudinal groove for guiding engagementwith the key strip,substantially set forth.

9. An extension spool formed with a longitudinal slit and transverseslits extending oppositely from the ends of the longitudinal slit todivide the spool into two members; individual end flanges on therespective members, and guiding means for connecting the memberstogether in a longitudinal adjustable manner, substantially as setforth.

10. An extension spool formed with a lone gitudinal slit and transverseslits extending oppositely from the ends of the longitudinal slit todivide the spool into two members; individual end flanges on therespective members, one member having a longitudinal key strip and theother member a longitudinal groove for guiding engagement with the keystrip, substantially as set forth.

11. An extension spool formed with a longitudinal slit and transverseslits extending oppositely from the ends of the longitudinal slit todivide the spool into two members, individual end flanges on therespective members, filler pieces at the respective ends of thelongitudinal slit, and guiding means for connecting the members togetherin a longitudinally adjustable manner, substantially as set forth.

12. An extension spool formed with a longitudinal slit and transverseslits extending oppositely from the ends of the longitudinal slit todivide the spool into two members; individual end flanges on therespective members, liller pieces at the respective ends of thelongitudinal slit, one member having a longitudinal key strip and theother member a longitudinal groove for guiding engagement with the keystrip, substantially as set forth.

13. An extension spool, comprising a pair of halves arranged in parallelrelation to each other and provided with full ortions 'at their ends,one half having a longitudinal key strip and the other half alongitudinal groove for guiding engagement with said key strip, thegroove and key strip being of a segmental form with the radius of thegroove greater than that of the key strip, substantially as set forth.

14. An extension spool formed with a longitudinal slit and transverseslits extending oppositely from the end of the longitudinal slit todivide the spool into two members, one member having a longitudinal keystrip and the other member a longitudinal groove for guiding engagementwith the key strip, the groove and key strip being of a segmental formwith the radius of the groove greater than that of the key stripsubstantially as set forth.

15. An extension spool formed with a longitudinal slit and transverseslits extending oppositely from lthe end of the longitudinal slit todivide the spool into two members, filler pieces at the respective endsof the longitudinal slit, one member having a longitudinal key strip andthe other member with a longitudinal groove for guiding engagement withthe key strip, the groove and the key strip being of a segmental formwith a radius of the groove greater than that of the key strip,substantially as set forth.

1G. An extension spool formed with a longitudinal slit and inlongitudinal relation to each other and provided with individual endflanges, one half having a longitudinal key strip and the other half alongitudinal groove for guiding engagement with the key strip, thegroove and key strip being of a segmental form with the radius of thegroove greater than -that of the key strip substantially as set forth.

17. An extension spool formed with a longitudinal slit and transverseslits extending oppositely from the end of the longitudinal slit todivide the spool into two members, individual end flanges on therespective members, one member having a longitudinal key strip and theother member a longitudinal groove for guiding engagement with the keystrip, the groove and key strip being of a segmental form with theradius of the groove greater than that of the key strip, substantiallyas set forth.

18. An extension spool formed with a longitudinal slit and transverseslits extending oppositely from the end of the longitudinal slit todivide the spool into two members, individual end flanges on therespective members, filler pieces at the respective ends of thelongitudinal slit, one member having a longitudinal key strip and theother member a Vlongitudinal groove for guiding engagement with the keystrip, the groove and the key strip being of a segmental form with theradius of the groove greater than that of the key strip, substantiallyas set forth.

Signed at Bayonne, New Jersey, this 9th day of March 1906.

PHILIP JACOB MEAHL.

Witnesses:

R. A. BoDEsoH, ROBERT BURNS.

